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TW201133413A - Detection method and system of low-speed vehicle or car-free status for a radar vehicle detector - Google Patents

Detection method and system of low-speed vehicle or car-free status for a radar vehicle detector Download PDF

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TW201133413A
TW201133413A TW99108141A TW99108141A TW201133413A TW 201133413 A TW201133413 A TW 201133413A TW 99108141 A TW99108141 A TW 99108141A TW 99108141 A TW99108141 A TW 99108141A TW 201133413 A TW201133413 A TW 201133413A
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Taiwan
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vehicle
radar
car
speed
detector
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TW99108141A
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Chinese (zh)
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TWI408626B (en
Inventor
Ming-De Ceng
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Cct Co Ltd
Ming-De Ceng
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Priority to TW99108141A priority Critical patent/TW201133413A/en
Publication of TW201133413A publication Critical patent/TW201133413A/en
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Publication of TWI408626B publication Critical patent/TWI408626B/zh

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  • Radar Systems Or Details Thereof (AREA)

Abstract

The present invention is to provide a detection method and a system of low-speed or car-free status for a radar vehicle detector, wherein the radar vehicle detector is installed in a traffic path for monitoring traffic flow status and reporting traffic jam information. This invention utilizes the radar vehicle detector to emit plural electromagnetic waves, and when the electromagnetic waves encounter a vehicle, it will produce a corresponding echo signal and return to the radar vehicle detector. The echo signal is subject to amplification, down-conversion, and filtering for outputting a digital signal from which the phase and cycle relationship of the vehicle is extracted and analyzed to obtain a distribution chart of cycle time difference and the number of cycles. From the pattern in the distribution figure of cycle time difference and the number of cycles, it is able to know whether a vehicle is (1) going to stop, (2) stop and (3) starting or the radar vehicle detector not detecting any vehicle, thereby monitoring traffic jam situation.

Description

201133413 六、發明說明: 【發明所屬之技術領域】 本發明係一種雷達車輛偵測器低速度或無車狀態之偵測方法及其系 統,其係特別關於一種當車輛處於低速狀態時,仍可偵測車輛的3種狀態(啟 動中、煞車中、完全停止)以及無車狀態的雷達車輛偵測器低速度或無車狀 態之偵測方法及其系統。 【先前技術】 1970年代以後’台灣的經濟結構朝向工商服務業發展,加速都市化發 展。如大都會(台北地區)地區車輛數目不斷地成長,不論公車、計程車、家 用車及貨車等車輛已成為目前交通工具之主流,在一般市區之平面道路上 於上、下班或其他年節之尖峰時間中,通常都會因車流量過大而遇到塞車 之問題。 車流量的資訊,是路況播報單位藉以提供行車駕駛人作為選擇行車路 線或改道的參考;或是交通管制單位作為儀控管制或調撥車道的重要依 據,而長時間的車道車流麟諸,更是肢交通運輸決策必備的資訊; 因此,如何自動且有效的侧計數車道車流量便是―錢集即時交通資訊 的重要課題。 直先前技術即時聽交通資訊的方式包括利用雷達車輛偵測器偵測車流 里之車速’雷達車輛_如正向架設龄式埋設在車道上 ^的方歧置鱗道旁祕_車舰速。但,#錢流料靜止= 來說速為低速’走走停停的狀許,以現有的雷達車輛偵測器 /、所偵測到之交通參數,如車流量、_、佔有率等等,皆因車流 3 201133413 停滯或緩慢而失去侧能城準確度麵,雷達車輛彳貞卿並無法判讀出 車流為『擁塞』的資訊。換言之’現有的雷達車輛侧^並不具備偵測車 流擁塞時的能力。 為此本發明提出-種雷達車輛_器之低速度或無車狀態之偵測方法 及其系統,以改善上述缺失。 【發明内容】 本發明之主要目的在提供-種之低速度絲車狀態之 侧方法及其纟統’其係將雷達朗於雷達車誠廳巾並取得週期時間 差及週期數的分佈曲_,藉由此技術概,讓控管者可以快速、簡單, 從週期時間差及週期數的分佈曲線圖中看到車輛分布、車流速度或相關資 訊等’讓鮮者,得以_獲得車締訊,相較於先前技術,本發明可以 週期夺間差及週期數的分佈曲線圖快速獲取車輛啟動、停止的關鍵資 訊,並可鱗解車絲塞、飾擁度。 本發明之另—目的在提供-種雷達車婦·之低速度或無車狀態之 貞Η方法及其植’其係於車域於低速狀態時仍可_車子的3種狀態 (啟動中煞車中、元全停止)之曲線圖(波形圖)或無車狀態,解決先前技術 雷達車輛綱H於低速走走料狀態雜不容錢晴衝的缺點。 本發明係、提供_種雷達車__之健度絲車祕之侧方法及 、、、’ X置在車路彳讀,絲監控交通輕速度,喃車流擁塞資訊, 1用雷達車輛細紐射複數電磁波,鱗電魏遇到車輛後,產生相對 應之回波信紐返回該雷達車_«。將讀賊進行放大、降頻、滤 波處理後輸4触賤,從數_號提取及分析車_減、週期關係, 201133413 並得到一個週期時間差及週期數的分佈曲線圖,由週期時間差及週期數分 佈曲線圖中型態樣式(pattern)可得知車輛⑴正在停止中、(2)停止與停多久及 (3)正在啟動中或無車狀態,並據以監控車流擁塞狀況。 本發明將雷達應用於雷達車輛偵測器中並取得週期時間差及週期數的 分佈曲線圖,藉由此技術特徵,讓控管者可以快速、簡單,從週期時間差 及週期數的分佈曲線圖中獲知車流處於低速狀態的相關資訊等,讓控管者 得以輕易獲得車流資訊,本發明可以藉由週期時間差及週期數的分佈曲線 鲁圖快速獲取車輛啟動、停止的關鍵資訊,並據以判斷車輛是屬於正在停止 中、停止中與停多久或正在啟動中或是無車狀態,藉此監控車流擁塞狀況。 底下藉由具體實施例配合所附的圖式詳加說明,當更容易瞭解本發明 之目的、技術内容、特點及其所達成之功效。 【實施方式】 本發明之雷達車輛彳貞測I!之低速度或無車狀態之侧方法及其系統, 其使用雷達車輛侧器,用來監控道路之車流情況。為能詳細說明本發明, φ首先說明偵測系統,請參照第i圖。雷達車輛侧器之低速度細或無車 狀態之偵測系聽括雷達車輛_器32、前置處 34、數位信號處理器 42;偵測系m在車流路徑處,如設置於十字路口處,用來偵測交通行 駛狀況’進而回報車流擁塞資訊。本實施例之車柄偵測系統係一雷達,雷 達中係有《波魏H 36、電魏接㈣38及料天㈣,電磁波發射 器36利用雷達天線40發射複數電磁信號,該等電磁信號遇到車輛後,產 生相對應之回波信號並被雷達天線4鳴後,返回傳回至電磁波接收器撕 前置處理器34,其輸入端與雷達車輛偵測器32連接,前置處理器% 201133413 的輸出端係與數位信號處理器42連接。前置處理器34可接收來自雷達車 輛_器32之回波信號;其中上述之回波信號係為高頻信號,前置處理器 Μ將此高頻信舰過放大、_、濾料處錢,觀成數健號,並將 數位信號賴至植健處理H 42,將由錢處理器Μ進行處理。 數位信號處理H 42,可從數健號提取及分鱗輛之督f勒信號的相 位、時間關係’並得到-個督普勒相位週期時間差及週期數分佈(數據域週 期時間差及週期數的分佈曲線圖’並可藉由督普勒相位週期時間差及週期 數分佈曲線圖中型態樣式(pattem)可得知車輛⑴正在停止中⑺停止與停多 久及⑶正在啟動中或是無車狀態等物理意義,並據以偵測車流擁塞狀況。 因此,-遠端控制中心藉由遠端控制中心之終端設備及網際網路與偵 測系統連接’遠端控制中心能藉此獲取偵測系統的偵測結果、直接遠端遙 控偵測系統實施偵測’或修改偵測系統的參數設定,在遠端控制中心之終 端設備亦可以連接-麵示獅,料成翻錄的目的。 繼續說明本發明之雷達車補_之低速度或無車狀態之伽方法, 請參照第2圖並配合參考第i圖。本發明之車輛侧方法係以雷達車婦 測器,設置在車祕徑處,可时監視交通車流。本實施例的實施步驟包 括SU ’利用雷達車輛_器發射複數電磁波,該等電磁波遇到車輛後,產 生相對應之回波信號並返回雷達車輛侧器;其係於車流路徑處以偵測系 統,偵測車輛督普勒信號回波誠每經過相_位差之週期_變化。其 中,偵測系統包括車柄偵測器32、前置處理器34、數位信號處理器42 ;伯 測器32在車流路徑處,如設置於十字路口處,用來_交通車流狀況。本 實施例之車輛侧器32係一 FMCW雷達偵測器,雷達中係有電磁波發射 201133413 器36、電磁波接收器38及雷達天線4〇,電磁波發射器%利用雷達天線⑽ 發射複數電磁㈣,鱗電磁錢遇到車輛後,產生相對應之回波信號並 被雷達天線4〇策集後,返回傳回至電磁波接收器抑。 接_行步驟S14 ’將喊信號進行放大、降頻、濾波處理後,輸出 數位信號;前置處理器34其輸入端與車輛偵測器料接,前置處理器从 的輸出端倾數位信號處理器42連接。前置處理器%可接收來自車輛偵 測H 32之回波信號;其中上述之回波信號係為高頻信號,前置處理器料 #將此高頻信號經過放大、降頻、濾、波等處理後,轉換成數位信號,並將數 位L號傳遞至數位信號處理II 42,將由數位信號處理^ 42進行處理。 接續進行轉S16,触信霞㈣42,可贿健雜取及分析車 輛之督普勒反射信號,並得到一個相位_時間分佈關係圖懷據),並可將該 相位-時間分佈關係轉換成週期時間差及週期數的分佈曲線圖,其具有複數 種型態樣式(pattern),分別具有該車輛停止、停止時間長度、啟動、或無車 狀態之物理意義’根據分佈崎®之鶴樣式輸出-侧結果。 春 最後進行步驟S18,將偵測結果(相位_時間分佈關係圖或週期時間差及 週期數的分佈曲線慑I之型態樣式)傳遞至輸出模組44,其中偵測結果可包括: 無車、煞車停止中、完全停止及從停止啟動中,以提供給監控者之車輕行 進的資訊。或者該偵測結果可直接為分析後的週期時間差及週期數之分佈 取線,或是為督普勒波形的相位-時間分佈關係圖。其中,本實施例之輪出 模組44包括網路或RS2322等通訊介面輸出三種狀態。 另外’亦可利用網際網路將偵測的結果傳遞遠端控制中心,遠端控制 中心可隨時獲取交通車流的當前狀況。 201133413 以下舉出兩種實施例分別為側向偵測與正向_之雷達車輛偵測器之 低速度或鱗祕之侧_,_週_及職_分佈曲線圖的 三種側向偵測的型態樣式及兩種正向偵測的型態樣式,並說明其分別的物 理意義。 首先說明侧向偵測之雷達車輛偵測器的設置位置,請參照第3圖所示, 第3圖係料車輛侧_向_車輛,雷料輛侧^ &烟到車輛^ 由A點行進到B點,再由B點行進到❻;其中A點為行進中,B點為靜 止’C點為行進中;換言之,車輛由A點位置行進细點時,車輛52是處 於減速陳態,車輛52由_位置行進耽_,車輛52是處於加速的 狀態》 所以,在-輛車輛進入之侧軸,其所獲得之相位-時間分佈關係 圖’請參照第㈣,及並將其轉換為週期時間差與週期數的分佈曲線圖, 請參照第4b圖。由第4a圖可知車輛在煞車或啟動時,會有變頻的波形, 車輛停止時則沒有變頻的波形。第4b圓係為第如圖中督普勒波形相位-時 間轉換得到。由於第2圖側向偵測的車輛煞車停止,所以第&圖中波形 有呈現變頻的趨勢,當每-個波的時間差越來越大,第扑圖可見車輛在煞 車,週期數會有遞增的時間差之趨勢;相對於第如圖之車輛停止時,第: 圖中週期數時間差的值極大,在第&圖中車輛啟動之訊號時,第处圖中 隨著時間增加,週期數之時間差值會有遞減的趨勢。因此,第处圖之週 期時間差及週期數的分佈曲線圖為第—種側向侧型態樣式,其代表= 車輛進入_範_,鱗減態錢速停止,再加速啟動之意義。早一 同樣再以綱細糊,當蝴轉(A車與B車)進人伽说園時,其 201133413 所獲得之相位-時間分佈關係圖,如第5a圖所示,及週期時間差與週期數的 分佈曲線圖(第二與第三種側向偵測之型態樣式)’如第5b圖及第5c圖所示。 其中’由第5a圖可知車輛A或(車輛B)在進入雷達車輛债測器的债測 範圍時’會有變頻的波形,經過雷達車輛偵測器的垂直點時變頻的波形會 有一個短暫的停頓’穿過垂直點離開(雷達車輛偵測器)後會有變頻的波形, 無車的時候則沒有波形出現。 經過週期時間差及週期數分佈的分析,可獲得第5b圖與第5e圖,在 φ第5a圖中’ A車離開-無車-B車進入的狀態可對應至第5b圖,車輛A離開 時週期數之時間差為遞增的情況,無車當時的週期數時間差的值具有相當 大值,車輛B進入時週期數之時間差為遞增的情況,此為週期時間差及週 期數的分佈曲線圖的第二種側向偵測之型態樣式。而第5c圖係指第5a圖 中,車輛A或(車輛B)經過雷達車輛偵測器的偵測範圍的情況,在第5c 圖中,車輛A進入垂直點時,縱軸(時間差)僅為較大值,車輛A(或車輛B) 進入侧細時’當時獅數之_差為倾遞增的情況,車輛A(或車輛 φ B)離開時,其週期數之時間差為遞減的情況,第5c圖為週期時間差及聊 數的分佈曲線圖之第三種側向偵測之型態樣式。 另外’第5c圖之第三種側向伽之型態樣式,亦會有類似第扑圖之 第-種型態樣式的情形發生。但是,兩者有兩大差異並不會混清,其原因: 第-、第4b圖表示出煞車停止時的縱軸(時間差)的值有一值極大(就是停車 時間);而第5c圖代表正常速度經過時的車輛的時間差值明顯較小」;第二、 所有的時間差值’正常的車輛經過時明顯較車輛停止時皆為小。 再者,本發明更提出另一種實施例係為正向細的雷達車輛摘測器之 201133413 低速度或無車狀態之伽H其雷達車輛_器位置係擺放在車流的正 上方之方位,因而產生不同的週期時間差及週期數的分佈曲線圖之正向偵 測之型態樣式’請見以下酬。第6 _為雷達車輛侧ϋ正向偵測車輛 之實施示意圖,如_示,雷達車_測_貞_汽車η由㈣行進 到Ε點’再由Ε點行進至F點;其中D點為行進中,Ε點為靜止,F點為 行進中;可知汽車由D點位置行娜點時,汽車52係處於減速狀態,在 汽車由E點至F點時,汽車52是處於加速狀態。 當-輛車進人正向_轉之範圍,有行進·靜止行進的行駛狀況發生 時’其所獲得的_結果與側向偵測的結果(第如圖及第扑圖)相似, 月參考第7圖由於側向偵測—輛車内行進-靜止·行進所獲得的相位-時間 刀佈關係®其週期數與週期時間差的遞增的情況顯著(第扑圖),相對地, 在正向伽時’相位·時間分料贿狀況亦會出現,但較第4b财的情況 '弱目此第7 ®為正向制之第—麵態樣式,顯示正向侧所獲得的 結果,其聊數的遞增或_情峨為緩和,而車靜止時麻生的時間值 為大值ϋ此正向俄測仍可判斷是否有單一車輛的停止於本侦測範圍 内〇 本發明再舉ib兩輛蝴Α車與Β車)進人正向伽_之實施例。第 8a圖及第8b圖為所獲得之相位_時間分佈關係圖以及週期時間差及週期數 的刀佈曲線圖’且第8b _第二種正向偵測之㈣樣式,以下進—步說明。 由第8a g可知車_ A或(車輛B)在正面經過雷料輔㈣的備測範 圍之相位·時間分佈關係圖時,其中A車或B車經過時會有賴的波形’沒 有車輛么過時則沒有變頻的波形。第8b圖係可由第⑼圖轉換得到,以第 201133413 8a圖為例,a車或B車等速經過,對應至第此圖可知每一個波的時間差相 等’其A車與B車的間隔,沒有車她過時,其週期數之時間差的值極大。 因此,本發明係提供一種雷達車柄偵測器之低速度或無車狀態之制 方法及其H 置在輕賴處,肖來監較通輕速度。本發明將雷 達應用於車輛制m並透過雷達車蝴·之贿訊棘得不同週期 -_差及勒數支分佈曲賴,其分為複數個不_魏樣式,藉由此型 •態樣式,讓控管者可峨速、簡單,獲縣輛分佈、車流狀況或相關資訊 •等,讓控管者得以輕易獲得車流資訊。 唯以上所述者,僅為本發明之較佳實施例而已,並非用來限定本發明 實施之範i «卩驗她_糊_撤、_、概及精神所 為之均等變化或修飾,均應包括於本發明之申請專利範圍内。 【圖式簡單說明】 第1圖係本侧之雷達車輛偵《及顯補組之方塊示意圖。 第2圖係本發明之實施流程方塊圓。 第3圖係本發明之-側向實施例之實施示意圓。 第及係當車柄由行進中轉為停止,再由停止轉為啟動時的車輛反 射之雷細刪崎日__,叫目倾咖 分佈曲線圖。 第5a圖〜第5c圖係當: 的偵測範圍的車輛 有車柄經過或離開雷達車輛價測器 反射之雷細刪軸日__,吻目蝴糊 的分佈曲線圖(側向偵測)。 ^ 第6圖係本發明之-正向實施例之實施示意圓。 201133413 第7圖係為本發明之一車輛行進中轉為停止,再由停止轉為啟動時的車輛 反射之相位週期時間差及週期數的分佈曲線圖。 第8a圖及第8b圖係當有(無)車輛經過雷達車輛偵測器的偵測範圍的車輛反 射之雷達波的督普勒波形與時間關係圖,以及相位週期時間差及週期數的 分佈曲線圖(正向偵測)。 【主要元件符號說明】 32 雷達車輛偵測器 34 前置處理器 36 電磁波發射器 38 電磁波接收器 40 雷達天線 42 數位信號處理器 44 顯示模組 52 車輛 12201133413 VI. Description of the Invention: [Technical Field] The present invention relates to a method and system for detecting a low speed or no car state of a radar vehicle detector, which is particularly related to a vehicle that is still in a low speed state. A method and system for detecting low-speed or car-free state of a radar vehicle detector that detects three states of the vehicle (initiating, braking, and completely stopping) and a car-free state. [Prior Art] After the 1970s, Taiwan's economic structure was heading towards the development of business services and accelerating urbanization. For example, the number of vehicles in the metropolitan area (Taipei area) continues to grow. Vehicles such as buses, taxis, family cars and trucks have become the mainstream of current transportation. They are used in the upper, lower or other years of the general urban roads. During peak hours, traffic jams are often encountered due to excessive traffic. The traffic information is used by the traffic reporting unit to provide driving drivers as a reference for selecting driving routes or diversions; or the traffic control unit is an important basis for gambling control or lanes, and long-term lane traffic is even more Information necessary for limb transportation decisions; therefore, how to automatically and effectively count the lane traffic is an important issue for Qianji instant traffic information. The way to listen to traffic information immediately by the prior art includes using the radar vehicle detector to detect the speed of the traffic in the traffic flow. 'Radar vehicles _ such as the erected age-type buried in the lanes ^. However, #钱流料 = = speed is low speed' stop and go, with the existing radar vehicle detector /, the detected traffic parameters, such as traffic, _, occupancy, etc. Because of the stagnation or slowness of the traffic flow 3 201133413, the accuracy of the side energy city was lost. The radar vehicle was unable to judge the traffic flow as "congested". In other words, the existing radar vehicle side does not have the ability to detect traffic congestion. To this end, the present invention proposes a method and system for detecting a low speed or carless state of a radar vehicle to improve the above-mentioned deficiency. SUMMARY OF THE INVENTION The main object of the present invention is to provide a method for the side of a low-speed wire car state and a system thereof, which is to distribute the radar to the radar car and to obtain the distribution of the cycle time difference and the number of cycles. With this technology, the controller can quickly and easily see the vehicle distribution, traffic speed or related information from the distribution curve of the cycle time difference and the number of cycles. Compared with the prior art, the present invention can quickly obtain the key information of starting and stopping the vehicle by using the distribution curve of the cycle difference and the number of cycles, and can scale the car plug and the decoration degree. Another object of the present invention is to provide a method for low-speed or car-free state of a radar vehicle, and to construct a vehicle that is still in a low-speed state. The graph (waveform diagram) or the car-free state of the medium and long-term stop) solves the shortcomings of the prior art radar vehicle class H in the low-speed walking material state. The invention provides a method for providing a side of the radar car __, and a method for the side of the car, and , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , The complex electromagnetic wave is shot, and after the scale motor Wei encounters the vehicle, the corresponding echo signal is generated and returned to the radar vehicle _«. The thief will be amplified, down-converted, filtered, and then transmitted with 4 touches. From the number _ number, the vehicle_decrease and periodic relationship are extracted and analyzed, and the distribution curve of the cycle time difference and the number of cycles is obtained, and the cycle time difference and period are obtained. The pattern in the number distribution curve shows whether the vehicle (1) is stopping, (2) stopping and stopping, and (3) starting or no-car, and monitoring traffic congestion. The invention applies the radar to the radar vehicle detector and obtains a distribution curve of the cycle time difference and the number of cycles. By using the technical features, the controller can be quickly and simply, from the cycle time difference and the cycle number distribution curve. Knowing the information about the traffic flow at a low speed, etc., the controller can easily obtain the traffic information. The present invention can quickly obtain the key information of the vehicle start and stop by the cycle time difference and the cycle number distribution curve, and judge the vehicle accordingly. It is a state of being stopped, stopped, and stopped for a long time or is starting or no car, thereby monitoring traffic congestion. The purpose, technical contents, features and effects achieved by the present invention will become more apparent from the detailed description of the embodiments and the accompanying drawings. [Embodiment] The method and system for the low speed or carless state of the radar vehicle of the present invention, which uses the radar vehicle side device, is used to monitor the traffic flow of the road. In order to explain the present invention in detail, φ first describes the detection system, please refer to the i-th diagram. The detection of the low-speed or no-vehicle state of the radar vehicle side is to listen to the radar vehicle _ 32, the front position 34, the digital signal processor 42; the detection system m is at the traffic path, such as at the intersection Used to detect traffic conditions and report traffic congestion information. The handle detection system of the embodiment is a radar, and the radar is provided with "Bo Wei H 36, electric Wei (4) 38 and material (4), and the electromagnetic wave transmitter 36 transmits a plurality of electromagnetic signals by using the radar antenna 40, and the electromagnetic signals are met. After the vehicle arrives, the corresponding echo signal is generated and is sounded by the radar antenna 4, and then returned to the electromagnetic wave receiver tearing front processor 34, and the input end thereof is connected with the radar vehicle detector 32, and the front processor is %. The output of 201133413 is coupled to digital signal processor 42. The pre-processor 34 can receive the echo signal from the radar vehicle_32; wherein the echo signal is a high-frequency signal, and the pre-processor 过 multiplies the high-frequency ship, _, filter material, and The number is in the number and the digital signal is applied to the planting process H 42, which will be processed by the money processor. The digital signal processing H 42, can extract and classify the phase and time relationship of the F-signal from the number of health signals and obtain a - Doppler phase cycle time difference and cycle number distribution (data domain cycle time difference and cycle number) The distribution curve can be used to determine whether the vehicle (1) is stopping (7) stopping and stopping, and (3) starting or no-car state by the mode of the Doppler phase cycle time difference and the cycle number distribution curve. Physical significance, and to detect traffic congestion. Therefore, the remote control center is connected to the detection system by the terminal device of the remote control center and the Internet. The remote control center can obtain the detection system. The detection result, the direct remote detection system implements the detection 'or modify the parameter setting of the detection system, and the terminal device in the remote control center can also be connected - the lion is displayed, which is expected to be the purpose of ripping. For the method of locating the low-speed or car-free state of the invention, please refer to FIG. 2 and refer to the figure i. The vehicle-side method of the present invention is a radar vehicle measuring device, which is set in the car. At the path, the traffic flow can be monitored at any time. The implementation steps of this embodiment include SU 'Using the radar vehicle _ to transmit a plurality of electromagnetic waves, and after the electromagnetic waves encounter the vehicle, generate corresponding echo signals and return to the radar vehicle side device; A detection system is detected at the vehicle flow path to detect a cycle _ change of the phase of the phase shift of the vehicle Doppler signal. The detection system includes a handle detector 32, a pre-processor 34, and a digital position. The signal processor 42 is located at the traffic path, such as at the intersection, for the traffic flow condition. The vehicle side device 32 of the embodiment is an FMCW radar detector with electromagnetic wave emission in the radar. 201133413 device 36, electromagnetic wave receiver 38 and radar antenna 4〇, electromagnetic wave transmitter% uses the radar antenna (10) to transmit complex electromagnetic (four), after the scale electromagnetic money encounters the vehicle, the corresponding echo signal is generated and is collected by the radar antenna 4 After that, the return is sent back to the electromagnetic wave receiver. Then, the step S14 is performed to amplify, down-convert, and filter the shouting signal, and then output a digital signal; the front processor 34 has its input end and the vehicle. The detector is connected, and the pre-processor is connected from the output of the digital signal processor 42. The pre-processor % can receive the echo signal from the vehicle detecting H 32; wherein the echo signal is high Frequency signal, pre-processor material #This high-frequency signal is processed by amplification, frequency reduction, filtering, wave, etc., and then converted into a digital signal, and the digital L number is transmitted to the digital signal processing II 42, which will be processed by the digital signal ^ 42 processing. Continue to transfer S16, touch Xinxia (four) 42, can take care of and analyze the vehicle's Doppler reflection signal, and get a phase _ time distribution relationship diagram), and the phase-time distribution The relationship is converted into a distribution curve of cycle time difference and cycle number, which has a plurality of pattern patterns, respectively having the physical meaning of the stop, stop time, start, or car-free state of the vehicle. Style output - side results. In the spring, step S18 is performed, and the detection result (phase_time distribution relationship diagram or cycle time difference and the distribution pattern of the cycle number 慑I) is transmitted to the output module 44, wherein the detection result may include: no car, The vehicle is stopped, stopped completely, and stopped from starting, to provide information to the monitor's car to travel lightly. Alternatively, the detection result may be directly taken from the distribution of the cycle time difference and the number of cycles after the analysis, or the phase-time distribution relationship of the Doppler waveform. The round-out module 44 of the embodiment includes three states of the communication interface such as the network or the RS2322. In addition, the Internet can also be used to transmit the results of the detection to the remote control center, and the remote control center can obtain the current status of the traffic flow at any time. 201133413 The following two embodiments are respectively for the lateral detection of the low-speed or scaly side of the lateral detection and forward _ radar vehicle detector, and the three side detections of the _, _ week _ and _ distribution curve Type pattern and two types of forward detection patterns, and explain their respective physical meanings. First, the position of the radar detection device for lateral detection is explained. Please refer to Figure 3, Figure 3 is the vehicle side _ _ vehicle, the lightning vehicle side ^ & smoke to the vehicle ^ from point A Go to point B, and then travel from point B to ❻; where point A is in progress, point B is stationary 'C point is in progress; in other words, when the vehicle travels fine point from point A, vehicle 52 is in deceleration The vehicle 52 is advanced by the _ position ,, and the vehicle 52 is in an accelerated state. Therefore, in the side axis of the vehicle entering, the phase-time distribution diagram obtained by the vehicle is referred to the fourth (fourth), and is converted. For the distribution curve of the cycle time difference and the number of cycles, please refer to Figure 4b. It can be seen from Fig. 4a that the vehicle will have a frequency conversion waveform when braking or starting, and there will be no frequency conversion waveform when the vehicle is stopped. The 4b circle is obtained by the phase-time conversion of the Doppler waveform as shown in the figure. Since the vehicle detected by the lateral detection in Figure 2 stops, the waveform in the & picture shows a trend of frequency conversion. When the time difference of each wave is getting larger and larger, the first map shows that the vehicle is braking, and the number of cycles will be The trend of increasing time difference; compared with the vehicle stopped as shown in the figure, the value of the time difference of the number of cycles in the figure is extremely large. When the vehicle starts the signal in the & diagram, the number of cycles increases with time in the figure. The time difference will have a decreasing trend. Therefore, the distribution of the time difference and the number of cycles in the first graph is the first type of lateral side pattern, which represents = the vehicle enters _ van _, the scale is reduced, the speed is stopped, and the acceleration is accelerated. As early as the same day, the same fineness, when the butterfly turn (A car and B car) into the Gaya Garden, the phase-time distribution relationship obtained by its 201133413, as shown in Figure 5a, and the cycle time difference and cycle The distribution curve of the number (the second and third types of lateral detection patterns) is as shown in Figures 5b and 5c. "It can be seen from Figure 5a that Vehicle A or (Vehicle B) will have a variable frequency waveform when entering the radar measurement range of the radar vehicle's debt detector. The waveform of the frequency conversion will be transient after passing through the vertical point of the radar vehicle detector. The pauses will have a variable frequency waveform after leaving the vertical point (radar vehicle detector), and no waveform will appear when there is no car. After the analysis of the cycle time difference and the cycle number distribution, the 5b and 5e diagrams can be obtained. In the 5th diagram of φ, the state of the 'A car leaving-car-free-B car can correspond to the 5b figure, when the vehicle A leaves When the time difference of the number of cycles is increasing, the time difference of the number of cycles at the time of no car has a considerable value, and the time difference of the number of cycles when the vehicle B enters is increasing, which is the second of the distribution of the cycle time difference and the number of cycles. A type of lateral detection. The 5th figure refers to the case where the vehicle A or (vehicle B) passes the detection range of the radar vehicle detector in Fig. 5a. In the 5th figure, when the vehicle A enters the vertical point, the vertical axis (time difference) is only For a larger value, when vehicle A (or vehicle B) enters the side, the difference between the number of lions at that time is increasing, and when vehicle A (or vehicle φ B) leaves, the time difference between the number of cycles is decreasing. Figure 5c shows the third lateral detection type pattern of the cycle time difference and the number of chats. In addition, the third lateral gamma pattern of the 5th figure also has a similar pattern of the first type of pattern. However, there are two major differences between the two and they are not mixed. The reasons are as follows: The first and fourth graphs show that the value of the vertical axis (time difference) when the brake is stopped has a large value (that is, the parking time); and the fifth figure represents the value. The time difference of the vehicle when the normal speed passes is significantly smaller. Second, all the time difference 'normal vehicle passing is obviously smaller than when the vehicle stops. Furthermore, the present invention further proposes another embodiment for the forward-smooth radar vehicle stalker 201133413 low-speed or car-free state gamma H whose radar vehicle _ position is placed directly above the traffic flow, Therefore, the pattern of positive detection of the distribution curve of different cycle time differences and cycle numbers is generated. Please see the following rewards. The sixth _ is a schematic diagram of the implementation of the radar vehicle side forward detecting vehicle, such as _, the radar car _ _ _ _ car η from (four) to the point 'and then from the point to point F; where point D is During the journey, the Ε point is stationary, and the F point is traveling. It can be seen that when the car is at the point D from the point D, the car 52 is in a deceleration state, and when the car is from the E point to the F point, the car 52 is in an accelerated state. When the vehicle enters the positive _ turn range, and there is a traveling/stationary driving situation, the _ result obtained is similar to the result of the lateral detection (the figure and the first map), the monthly reference Figure 7 shows the phase-time relationship between the number of cycles and the cycle time due to lateral detection—intra-vehicle travel-stationary-traveling—there is a significant increase in the cycle time difference (plot), in contrast, in the forward gamma At the time of 'phase and time, the situation of bribes will also appear, but the situation is weaker than the situation in the 4th bucks. This 7th ® is the first form of the positive system, showing the results obtained on the positive side, and the number of chats. The increment or _ situation is easing, and the time value of the asbestness when the car is stationary is a large value. This positive Russian test can still determine whether there is a single vehicle that stops within the detection range. The brakes and the brakes are introduced into the positive gamma. Fig. 8a and Fig. 8b are the obtained phase_time distribution relationship diagram and the cycle time difference and the number of cycles of the blade diagram' and the 8b_the second type of forward detection (4), the following step-by-step description. From the 8th g, we can see the phase/time distribution relationship of the vehicle _A or (vehicle B) in the preparation range of the lightning aid (4) on the front side, in which the waveform of the A or B vehicle passes by, there is no vehicle. There is no waveform for frequency conversion. The 8th figure can be converted from the figure (9). Taking the picture of 201133413 8a as an example, a car or a B car passes at a constant speed. Corresponding to the figure, the time difference of each wave is equal to the interval between the A car and the B car. When she is out of date, the time difference between the number of cycles is extremely large. Therefore, the present invention provides a method for manufacturing a low speed or carless state of a radar handle detector and its H is placed at a lighter position. The invention applies the radar to the vehicle manufacturing system and transmits the bribe of the radar to the different periods of the cycle--difference and the number of the number of the branch, which is divided into a plurality of non-wei styles, by which the style is To allow the controller to idle, simple, get the county distribution, traffic status or related information, etc., so that the controller can easily obtain traffic information. The above is only the preferred embodiment of the present invention, and is not intended to limit the implementation of the present invention, and the equivalent changes or modifications of the spirit of the present invention should be It is included in the scope of the patent application of the present invention. [Simple description of the diagram] Figure 1 is a block diagram of the radar vehicle detection and display group on the side. Figure 2 is a block circle of the implementation process of the present invention. Figure 3 is a schematic representation of the implementation of the lateral embodiment of the invention. The first part is when the handle is turned from stop to stop, and then the vehicle is turned from the stop to the start of the reversal of the reversal of the __, called the distribution chart. Figure 5a~5c are when: The detection range of the vehicle has a handle that passes or leaves the radar vehicle's price detector to reflect the deflection of the axis __, the distribution curve of the kiss eyes (lateral detection ). ^ Figure 6 is a schematic circle of the implementation of the present invention - a positive embodiment. 201133413 Fig. 7 is a distribution diagram of the phase cycle time difference and the number of cycles of the vehicle reflection when the vehicle is transiting to stop and then turning from the stop to the start. Figures 8a and 8b are the relationship between the Doppler waveform and the time of the radar wave reflected by the vehicle with the (none) vehicle passing the detection range of the radar vehicle detector, and the distribution of the phase cycle time difference and the number of cycles. Figure (forward detection). [Main component symbol description] 32 Radar vehicle detector 34 Pre-processor 36 Electromagnetic wave transmitter 38 Electromagnetic wave receiver 40 Radar antenna 42 Digital signal processor 44 Display module 52 Vehicle 12

Claims (1)

201133413 七、申請專利範圍: 1、 一種雷達車輛偵測器之低速度或無車狀態之偵測方法,係以一雷達車輛 偵測器,設置在車流路徑處,用來監控交通狀況,回報車流擁塞資訊, 該車流速度監控方法包括下列步驟: 利用該雷達車輛偵測器發射複數電磁波,該等電磁波遇到至少一車輛 後,產生相對應之回波信號並返回該雷達車輛偵測器; 將該回波信號進行放大、降頻、濾波處理後,輸出一數位信號,從該數 • 位信號提取及分析該車輛的相位·時間分佈,轉換成一週期時間差及週 期數的分佈曲線圖;以及 根據該週麟間差及聊數的分佈鱗圖,得知該車輛行驶狀態之一伯 測結果。 2、 如申請專利範圍第i項所述之雷達車_之低速度或無車狀態之偵 測方法,其中該雷達車輛細輯—雷達,該雷達包括_電磁波發射 器、-電磁波接收器及-雷達天線,以該電磁波發射器產生電磁波,並 φ 利用該雷達天線發射電磁波,或接收回波信號。 3如申明專利範圍第1項所述之雷達車輛綱器之低速度或無車狀態之债 測方法’其中利用一前置處理器對回波信號進行放大、降頻、滤波處理。 ⑯巾4糾碰第1項所叙雷達車_難之低速度或無車狀態之偵 肩]方法其中利用-數位信號處理器從該數位信號提取及分析該車辆的 相位-時間分佈。 如申請專利範圍第4項所述之雷達車輔偵測器之低速度或無車狀態之偵 彷法其中將數位域處理器的處理後的該相位時間分佈轉換成該週 13 201133413 期時間差及週期數的分佈曲線圖,以判斷該車輔行敬狀態。 6、如申物_第丨顧述之料車_脱低速度或無車狀態之福 測方法,更包括一步驟: 將該债測結果傳送給一輸出模組輸出。 如申明專利範圍第1項所述之雷達車辅偵測器之低速度或無車狀態之摘 測方法,其巾辩電磁麟_車輛,透過賊健號轉換後 ,獲得該 偵測結果包括財輛是正在停止巾、停止巾、料久或正在啟射。 8、 如申請專利範圍第i項所述之雷達車_測器之低速度或無車狀態之伯籲 測方法’其中該等電磁波遇到複數個車輛,其包含—第—車輛及一第二 車輛’該偵測結果顯示該第-車輛進出該雷達車輛偵測器的偵測範圍 後,隨後一第二車輛進入進出該偵測範圍。 9、 如申請專利範圍第丨項所述之雷達車輛侧器之低速度或無車狀態之伯 測方法,其中從該數位信號提取及分析該車辅的相位-時間分佈係為督普 勒相位週期時間差及週期數分佈’進而轉換為該週期時間差及週期數的 分佈曲線圖’其包括複數個型態樣式其分別具有該車輛停止、籲 停止時間長度、啟動、或無車狀態之物理意義。 14201133413 VII. Patent application scope: 1. A method for detecting low-speed or car-free state of a radar vehicle detector, which is set up in a traffic path by a radar vehicle detector for monitoring traffic conditions and reporting traffic flow. Congestion information, the vehicle flow speed monitoring method comprises the following steps: using the radar vehicle detector to transmit a plurality of electromagnetic waves, the electromagnetic waves encountering at least one vehicle, generating a corresponding echo signal and returning to the radar vehicle detector; After the echo signal is amplified, frequency-reduced, and filtered, a digital signal is output, and the phase/time distribution of the vehicle is extracted and analyzed from the digital signal, and converted into a distribution curve of a cycle time difference and a cycle number; The distribution scale of the difference between the week and the number of chats, and one of the results of the test of the vehicle. 2. A method for detecting a low-speed or car-free state of a radar vehicle as described in claim i, wherein the radar vehicle includes a radar, the radar includes an electromagnetic wave transmitter, an electromagnetic wave receiver, and A radar antenna that generates electromagnetic waves by the electromagnetic wave transmitter and uses the radar antenna to emit electromagnetic waves or receive echo signals. (3) A method for measuring a low-speed or car-free state of a radar vehicle as described in claim 1 wherein the echo signal is amplified, down-converted, and filtered by a pre-processor. 16 towel 4 colliding the first aspect of the radar vehicle _ difficult low speed or carless state detection method] wherein the digital signal processor is used to extract and analyze the phase-time distribution of the vehicle from the digital signal. The low-speed or car-free state detection method of the radar vehicle auxiliary detector according to claim 4, wherein the processed phase time distribution of the digital domain processor is converted into the time difference of the week 13 201133413 and A distribution curve of the number of cycles to determine the state of the vehicle. 6. For example, the method of measuring the _ 丨 丨 丨 料 _ 脱 脱 脱 脱 脱 脱 脱 脱 脱 脱 脱 脱 脱 脱 脱 脱 脱 脱 脱 脱 脱 脱 脱 脱 脱 脱 脱 脱 脱 脱 脱 脱 脱For example, in the method of extracting the low-speed or car-free state of the radar vehicle auxiliary detector described in the first paragraph of the patent scope, the method of detecting the electromagnetic lining_vehicle, after the conversion of the thief health number, obtains the detection result including the wealth The car is stopping the towel, stopping the towel, waiting for a long time or starting. 8. The method of claiming a low speed or car-free state of a radar vehicle as described in claim i, wherein the electromagnetic waves encounter a plurality of vehicles, including - a vehicle and a second The vehicle's detection result indicates that the first vehicle enters and exits the detection range of the radar vehicle detector, and then a second vehicle enters and exits the detection range. 9. The method for testing a low-speed or car-free state of a radar vehicle side device according to the third aspect of the patent application, wherein the phase-time distribution of the vehicle auxiliary is extracted and analyzed from the digital signal to be a Dühler phase. The cycle time difference and the cycle number distribution are further converted into a distribution curve of the cycle time difference and the number of cycles, which includes a plurality of pattern patterns having physical meanings of the vehicle stop, the stop time length, the start, or the car-free state, respectively. 14
TW99108141A 2010-03-19 2010-03-19 Detection method and system of low-speed vehicle or car-free status for a radar vehicle detector TW201133413A (en)

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